A lifting belt is not back support. It is a wall for your abdominals to push against, which raises the pressure inside your trunk and stabilises the spine under load. Understanding that changes how you size it and how tight you wear it.
Measure your waist, not your trousers
Belt sizing follows the circumference around your navel, standing relaxed, not your trouser size. Measure with a tape at the height the belt will actually sit — just above the hip bones, below the ribs. Trouser sizes run one to three inches smaller than this measurement, which is why belts bought on trouser size arrive too small.
| Waist at navel | Usual belt size |
|---|---|
| 24–30 in | Small |
| 30–36 in | Medium |
| 36–42 in | Large |
| 42–48 in | X-Large |
Sizes vary between manufacturers. Every belt listing shows that maker’s own range — check it rather than assuming your size carries across brands.
Width and thickness
A 4-inch belt of even width all the way round is the powerlifting standard: it gives your abdominals the same wall at the front and the back. Tapered belts, wider at the back and narrow at the front, are more comfortable to wear but give you less to brace into where it matters.
On thickness: 10 mm suits almost everyone. 13 mm is stiffer, takes months to break in, and is only worth it if you are lifting genuinely heavy.
Watch: bracing against the belt
A belt only works if you push out into it. This covers the breath and the brace.
Prong, lever or velcro
- Single prong — quick, plenty strong, the sensible default.
- Double prong — no stronger in practice, slower to fasten. Skip unless you like it.
- Lever — fastest on and off, identical tightness every rep, but changing the setting means unscrewing the plate.
- Velcro — fine for conditioning and lighter work, not for maximal lifts.
How tight
Tight enough that you can push out against it hard, loose enough to get a full breath into your belly first. A belt so tight you cannot breathe into it is doing the opposite of its job. Slide a flat hand between belt and stomach: it should be snug, not impossible.
When not to wear one
Warm-ups, accessory work and anything under about 80% of your best lift do not need a belt. Bracing without one is a skill; wearing a belt for everything means you never build it.
Belts, wraps and straps are in Gym Accessories, each with the manufacturer’s own size chart on the listing. Between two sizes? E-mail support@goviloop.com with your navel measurement and we will check the chart for you.